SpringMVC 注解Demo

在web. xml中添加

01.<context-param>  
02.        <param-name>contextConfigLocation</param-name>  
03.        <param-value>/WEB-INF/applicationContext.xml</param-value>  
04.    </context-param>  
05.    <listener>  
06.        <listener-class>  
07.            org.springframework.web.context.ContextLoaderListener  
08.        </listener-class>  
09.    </listener>  
10.    <servlet>  
11.        <servlet-name>spring</servlet-name>  
12.        <servlet-class>  
13.            org.springframework.web.servlet.DispatcherServlet  
14.        </servlet-class>  
15.        <load-on-startup>1</load-on-startup>  
16.    </servlet>  
17.    <servlet-mapping>  
18.        <servlet-name>spring</servlet-name>  
19.        <url-pattern>*.do</url-pattern>  
20.    </servlet-mapping>  
21.    <filter>  
22.        <filter-name>Encoding</filter-name>  
23.        <filter-class>  
24.            org.springframework.web.filter.CharacterEncodingFilter  
25.        </filter-class>  
26.        <init-param>  
27.            <param-name>encoding</param-name>  
28.            <param-value>utf8</param-value>  
29.        </init-param>  
30.    </filter>  
31.    <filter-mapping>  
32.        <filter-name>Encoding</filter-name>  
33.        <url-pattern>/*</url-pattern>  
34.    </filter-mapping>  

另外在WEB-INF下新建applicationContext.xml

01.<?xml version="1.0" encoding="UTF-8"?>   
02.  
03.    <beans xmlns="http://www.springframework.org/schema/beans"    
04.  
05.     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"    
06.  
07.     xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"    
08.  
09.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    
10.  
11.     xsi:schemaLocation="    
12.  
13.             http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    
14.  
15.       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd    
16.  
17.       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd    
18.  
19.       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">    
20.  
21.        
22.  
23.     <context:annotation-config />    
24.  
25.     <context:component-scan base-package="org.app.demo.spring" />  <!-- 自动扫描所有注解该路径 -->       
26.  
27.</beans>

在WEB-INF下新建spring-servlet.xml

01.<?xml version="1.0" encoding="UTF-8"?>    
02.  
03.  <beans xmlns="http://www.springframework.org/schema/beans"      
04.  
05.       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"      
06.  
07.        xmlns:context="http://www.springframework.org/schema/context"      
08.  
09.   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    
10.  
11.       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd    
12.  
13.       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd    
14.  
15.       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">    
16.  
17.      
18.  
19.  <context:annotation-config />    
20.  
21.       <!-- 把标记了@Controller注解的类转换为bean -->      
22.  
23.      <context:component-scan base-package="org.app.demo.spring.controller" />  
24.  
25.             <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->      
26.  
27.      <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />      
28.  
29.         
30.  
31.       <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->      
32.  
33.       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"      
34.  
35.          p:prefix="/WEB-INF/views/" p:suffix=".jsp" />      
36.  
37.            
38.  
39.       <bean id="multipartResolver"      
40.  
41.          class="org.springframework.web.multipart.commons.CommonsMultipartResolver"      
42.  
43.          p:defaultEncoding="utf-8" />      
44.  
45. </beans>

在源目录下新建三个包

01.org.app.demo.spring.controller  
02.  
03.org.app.demo.spring.service  
04.  
05.org.app.demo.spring.service.impl 

在controller包下建HelloWorldController类

01.package org.app.demo.spring.controller;  
02.  
03.   
04.  
05.import javax.servlet.http.HttpServletRequest;  
06.  
07.import org.app.demo.spring.service.HelloWorldService;  
08.  
09.import org.springframework.beans.factory.annotation.Autowired;  
10.  
11.import org.springframework.stereotype.Controller;  
12.  
13.import org.springframework.web.bind.annotation.RequestMapping;  
14.  
15.import org.springframework.web.bind.annotation.RequestParam;  
16.  
17.   
18.  
19.@Controller  
20.  
21.@RequestMapping("/helloworld.do")  
22.  
23.public class HelloWorldController{  
24.  
25.   
26.  
27.       @Autowired  
28.  
29.       private HelloWorldService helloWorldService;  
30.  
31.         
32.  
33.       @RequestMapping  
34.  
35.       public String getNewName(@RequestParam("userName") String userName, HttpServletRequest request){  
36.  
37.              String newUserName = helloWorldService.getNewName(userName);  
38.  
39.              request.setAttribute("newUserName", newUserName);  
40.  
41.              return "helloworld";  
42.  
43.       }  
44.  
45.}

在service包下新建HelloWorldService接口

01.package org.app.demo.spring.service;  
02.  
03.public interface HelloWorldService {  
04.  
05.       public String getNewName(String userName);  
06.  
07.}  
08.  
09.在impl包下新建HelloWorldService接口的实现类HelloWorldServiceImpl类  
10.package org.app.demo.spring.service.impl;  
11.  
12.import org.app.demo.spring.service.HelloWorldService;  
13.  
14.import org.springframework.stereotype.Service;  
15.  
16.import org.springframework.transaction.annotation.Transactional;  
17.  
18.@Service  
19.  
20.public class HelloWorldServiceImpl implements HelloWorldService {  
21.  
22.       @Override  
23.  
24.       @Transactional  
25.  
26.       public String getNewName(String userName) {  
27.  
28.              return "Hello Spring!" + userName;  
29.  
30.       }  
31.  
32.}

新建index.jsp

01.<%@ page language="java" contentType="text/html; charset=UTF-8"  
02.  
03.    pageEncoding="UTF-8"%>  
04.  
05.<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
06.  
07.<html>  
08.  
09.<head>  
10.  
11.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
12.  
13.<title>Insert title here</title>  
14.  
15.<link rel="stylesheet" type="text/css" href="http://wjjcml1982.blog.163.com/blog/css/db_browser.css">  
16.  
17.</head>  
18.  
19.<body>  
20.  
21.<form action="helloworld.do" method="post">  
22.  
23.请输入姓名：<input type="text" name="userName" />  
24.  
25.<input type="submit" value="提交" />  
26.  
27.<br />  
28.  
29.</form>  
30.  
31.</body>  
32.  
33.</html>

然后再WEB-INF目录下新建views目录，在views目录下新建helloworld.jsp

01.<%@ page language="java" contentType="text/html; charset=UTF-8"  
02.  
03.    pageEncoding="UTF-8"%>  
04.  
05.<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
06.  
07.<html>  
08.  
09.<head>  
10.  
11.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
12.  
13.<title>Insert title here</title>  
14.  
15.<link rel="stylesheet" type="text/css" href="http://wjjcml1982.blog.163.com/blog/css/db_browser.css">  
16.  
17.</head>  
18.  
19.<body>  
20.  
21.<h1><%=request.getAttribute("newUserName")%></h1>  
22.  
23.</body>  
24.  
25.</html>

保存完后布置到Tomcat中，启动Tomcat,访问http://localhost:8080/myapp/index.jsp

输入姓名（如张三）后,页面会跳转到http://localhost:8080/myapp/helloworld.do。
显示Hello Spring！张三。一切OK


引用页面:http://blog.csdn.net/hepeng154833488/article/details/6653032